Awakened Fierce Corpse

Fierce corpses are corpses that have reanimated due to resentful energy. They can only be generated from playable races, and are usually human. They are an Undead creature, and although they are not sentient, they are capable of recognising friends and foes to some degree. They are marked by their dark eyes and the cracked, black lines that spread from their chest.

An incredibly powerful demonic cultivator, wielding a strong demonic artefact and in possession of the corpse's soul, can awaken a fierce corpse, granting it back its sentience. An Awakened Fierce Corpse will usually hold great loyalty to the cultivator who awakened them. The finer control over their own resentful energy allows the Awakened Fierce Corpse to use powerful skills to control the battlefield, and they specialise in battles that involve fighting many weaker opponents - though they can be a formidable one-on-one opponent as well.

Inhuman Nature

Prerequisite - must be undead.

Starting when you become an awakened Fierce Corpse at 3rd level, you gain inhuman strength. Your carrying capacity goes up to that of a 'huge' creature. You gain a permanent +2 to your strength score and cannot be exhausted by non magical means. You can gain the benefits of a long rest within 4 hours.

However, despite being Awakened by a demonic cultivator and given back your spiritual cognition, you are still uniquely weak against powers that would seek to posses and control you. You have disadvantage on all saving throws against being possessed or  charmed.. 

Resentful Energy Roar

Beginning at 6th level, as an action, you can let out a roar powered by Resentful energy once each time you rage. 

Creatures within 30 ft must make a Wis saving throw against 8 + your WIS modifier + Proficiency.
On a failed save, any creatures within 15 ft take 3d8 necrotic damage. On a successful save, the creatures takes half as much damage.
On a failed save, any non friendly creatures with you within 30 ft become frightened.

Enraging Presence

Beginning at 10th level, you can force enemies to focus on you instead of your teammates.

While you're raging, any hostile creature within 5 feet of you is forced to focus on you. If the creature targets any character other than you or another character with this feature with a spell or attack, they must first make a Charisma saving throw (DC 8 + Charisma modifier + proficiency). On a failed save, the creature must target you or another character with this feature, or to lose the Attack or spell.

Leap to Defend

When an ally you can see takes damage from a creature, you can use your reaction to move your move allowance and make your wielded melee weapon attack against that creature. Even if you don't move the full distance, this uses your next turn's entire movement allowance, so you cannot move on that turn.